JP2730917B2 - Roll and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll used for ink delivery and paper feeding and a method for producing the same, and more particularly to a roll formed by bonding vulcanized rubber particles to the surface of a cored bar. The present invention relates to a rubber roll having irregular irregular surfaces.

[Prior art and problems] Conventionally, for example, in a keyless ink transfer roll, in order to increase an ink supply amount, and in a paper feed roll, a take-up roll of a fabric, etc., a roll is increased by various means in order to increase a wear coefficient. The surface is roughened.

(1) When the surface is roughened by polishing: When the surface of the roll is roughened by polishing, streaks are formed in the rotation direction and the pattern appears on the printed matter. Further, it is difficult to expose the surface of the same pattern, and the printed matter is not stable. Further, there is a limit in increasing the surface roughness of the roll.

(2) When the surface is roughened by machining, laser processing, etc .; the ink is sealed by the nip of the roll, regardless of the size and depth of the recess, and the density of the number of recesses with respect to the roll surface area. The pattern on the roll surface is reproduced.

The use of expensive equipment increases the manufacturing cost.

Although it has the advantage that it can be patterned as compared with polishing, the surface area is still insufficient.

When the concave portion is formed as a continuous groove, the pattern on the roll surface is reproduced in the printed matter, although there is considerable difference depending on the angle with respect to the circumferential direction. When the concave portions are reduced in the vertical and horizontal directions, the influence of pattern reproduction on the printed matter is reduced, but not completely, the ink adjustment amount is reduced, and the density of the printed matter is not obtained.

The present invention has been made in view of the above circumstances, and forms irregular irregular patterns in which recesses are connected by applying elastic particles to the surface using an adhesive, thereby providing a wider range of ink metering. It is an object of the present invention to provide a roll capable of preventing the pattern of the surface from being reproduced on a printed material and increasing the coefficient of friction of the surface to facilitate paper feeding and winding of the fabric, and a method of manufacturing the same.

Means for Solving the Problems The first invention of the present application includes a cored bar and a surface layer provided directly or via a rubber layer on the outer periphery of the cored bar, and the surface layer is formed of rubber particles. A roll having a continuous pattern of concave portions, obtained by substantially uniformly bonding elastic particles such as synthetic resin particles, cork particles and the like with an adhesive.

According to the second invention of the present application, elastic particles such as rubber particles, synthetic resin particles, cork particles and the like are adhered to the outer periphery of the core metal directly or via a rubber layer with an adhesive to form a pattern in which the concave portions are continuous. Step of forming a surface layer having, after further applying the adhesive once or twice from the top of the particles having elasticity,
Heating the adhesive to cure the adhesive.

Examples of the core metal according to the present invention include general metals such as iron and plastics.

In the present invention, the particles having elasticity include nitrile rubber (NBR), synthetic natural rubber (IR), natural rubber (NR),
Rubber particles such as styrene-butadiene rubber (SBR), synthetic resin particles, cork particles, and the like.

In the present invention, the characteristics of the surface condition of the roll can be changed by appropriately selecting the particle size, hardness, or type of the adhesive having the above-described elastic particles, and a roll can be produced according to the intended use.

In the present invention, the particles having elasticity are fixed directly to the outer periphery of the core by an adhesive or via a rubber layer, but the adhesive does not cover the particles because an irregular pattern is formed on the roll surface. It is necessary to apply with an appropriate thickness.

[Action] According to the roll according to the present invention, an irregular pattern is formed on the roll surface by applying particles having elasticity on the surface to the outer periphery of the core metal directly or via a rubber layer using an adhesive. When used as a keyless ink delivery roll because it can be formed and the recess communicates, high-quality printing can be achieved without using ink rolls with a wide range of ink metering patterns on the roll surface. it can. Further, according to the above-mentioned roll, the coefficient of friction of the surface is increased, so that the roll exerts a very effective action as a paper feed roll and a take-up roll for fabric. The same effect as described above can be obtained with the roll obtained by the method of the present invention.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Here, FIG. 2 is a sectional view taken along line XX of FIG.

Reference numeral 11 in the drawing denotes a core metal. A rubber layer 12 and an undercoat adhesive layer 13 are formed on the outer periphery of the core metal 11. An overcoating adhesive layer 14 is provided on the adhesive layer 13, and a number of NBR rubber particles (particles) obtained by pulverizing a vulcanized product of nitrile rubber (NBR) 60 ° are provided on the overcoating adhesive layer 14. 350-500μ diameter
m) 15 is partially exposed and embedded.

Thus, according to the rubber roll according to the above embodiment, the undercoat adhesive layer 13 is provided on the outer periphery of the cored bar 11 with the rubber layer 12 interposed therebetween, and the overcoat adhesive layer 14 is provided on the adhesive layer 13. Since a large number of rubber particles 15 obtained by pulverizing the NBR downstream product in the overcoat adhesive layer 14 are partially exposed and embedded, it is possible to form an irregular uneven pattern on the roll surface When used as a keyless ink delivery roll, the recesses are communicated with each other, so that ink can be metered in a wide range, and high-quality printing can be performed without a pattern on the roll surface being reproduced on a printed material. Further, according to the above-mentioned roll, the coefficient of friction of the surface is increased, so that the roll exerts a very effective action as a paper feed roll and a take-up roll for fabric.

Next, how to make a rubber roll having such a structure will be described.

(I) Method 1 First, a rubber layer 12 made of NBR60 # is formed on the outer periphery of a metal core 11 by a general method, and the surface is polished. next,
The compound of NBR60 ゜ is vulcanized, and this rubber is pulverized by a pulverizer and cut with a sieve so that the particle diameter becomes 350 to 500 μm. Subsequently, a urethane-based adhesive was applied to the surface of the rubber layer 12 by spraying while rotating the cored bar 11 in this manner to form an undercoat adhesive layer 13.

Next, before the adhesive layer 13 is not dried,
The rubber particles of the R vulcanizate are sprinkled on the adhesive layer 13 while rotating the metal core 11. Subsequently, when the rubber particles uniformly adhered to the surface of the adhesive layer 13, the urethane-based adhesive was sprayed and sprayed continuously, and when the solvent was blown off by air-drying, it was put into a heating furnace at 80 ° C. for about 5 hours, Top coat adhesive layer 14
Was formed. As a result, a roll having an irregular uneven pattern on the surface and communicating the concave portions was formed.

(II) Method 2 First, the surface of the core metal 11 is degreased. Next, similarly to the method (I), an epoxy-based overcoat adhesive layer 13 is formed on the outer periphery of the metal core 11. Next, the rubber particles of the NBR vulcanizate used in the method (I) are sprinkled on the adhesive layer 13 while rotating the metal core 11. Subsequently, when the rubber particles uniformly adhered to the surface of the adhesive layer 13, the urethane-based adhesive was sprayed and sprayed continuously, and when the solvent was blown off by air-drying, it was put into a heating furnace at 80 ° C. for about 5 hours, An overcoat adhesive layer 14 was formed. As a result, a roll was formed in which the surface had an irregular pattern of irregularities and the recesses were in communication.

Thus, according to the method of the present invention, after forming the undercoating adhesive layer 13 directly or via the rubber layer 12 on the outer periphery of the cored bar 11, the NBR vulcanized rubber particles 15 are coated on the overcoating adhesive layer 14. Since a part of the rubber particles 15 was formed so as to be embedded in the overcoating adhesive layer 14 through the intermediary, a roll having an irregular uneven surface and communicating the concave portions was formed. Therefore,
When the roll obtained in this manner is used as a keyless ink transfer roll, a wide range of ink metering is possible, and high-quality printing can be performed without the roll surface pattern being reproduced on a printed material. Further, according to the above-mentioned roll, since the coefficient of friction of the surface becomes large, the paper feed roll,
It exhibited a very effective action as a winding roll for woven fabric. Furthermore, since the unevenness pattern of the roll surface can be changed only by changing the particle size of the powder of the NBR vulcanizate, rolls having different surface roughness can be easily produced.

In fact, the roll produced in the above method 1 was used as a synthetic leather gluing roll as shown in FIG. In FIG. 3, reference numeral 21 denotes a glue tank, 22 denotes a glue roll 25 for conveying synthetic leather 24 with a pressure roll 23, and a blade. As a result, since the concave portions communicated with the irregularities on the roll surface, the width of the glue was adjusted, and uniform gluing was achieved. On the other hand, in the conventional case, since the mesh roll was used, the pattern on the roll surface was reproduced, and uniform gluing could not be performed. Further, as a result of using the roll produced in the above method 2 as a take-up roll for a loom as shown in FIG. 4, the roll surface has irregular irregularities, so that the frictional resistance of the roll surface increases, and No slippage when winding. In FIG. 4, reference numeral 26 denotes a separate roll according to the present invention, and reference numeral 27 denotes a free roll for conveying the woven fabric 28 to a take-up roll 29.

In the above embodiment, the elastic particles and
The case of using rubber particles obtained by pulverizing NBR vulcanizates was described, but not limited to this, and synthetic natural rubber (IR),
Rubber particles made of natural rubber (NR), styrene-butadiene rubber (SBR), or the like, synthetic resin particles, cork particles, or the like may be used.

In the above embodiment, the case where the present invention is applied to a printing press has been described. However, the present invention is not limited to this, and a coater roll for tinplate,
When used for gluing rolls of natural leather, synthetic leather, vinyl, felt, rubber, wood, etc., and magnetic coating liquid rolls for magnetic tape, etc., any coating amount can be supplied uniformly and the metering is simple and the coating surface is simple. Become smooth.

[Effects of the Invention] As described in detail above, according to the present invention, irregular irregular patterns are formed by applying elastic particles to the surface using an adhesive layer, and the ink is metered at low cost. A roll that is effective as a take-up roll for keyless ink transfer rolls, paper feed rollers, fabrics, etc. A manufacturing method can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of an ink transfer roll according to one embodiment of the present invention, FIG. 2 is a sectional view taken along line XX of FIG.
FIG. 4 and FIG. 4 are explanatory diagrams each showing an example of use of the roll according to the present invention. 11 ... Core, 12 ... Rubber layer, 13,14 ... Adhesive layer, 15 ...
... rubber particles.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F16C 13/00 0374-3J F16C 13/00 B

Claims (2)

(57) [Claims] 1. A core metal and a surface layer provided directly or via a rubber layer on an outer periphery of the core metal, and the surface layer has elasticity of rubber particles, synthetic resin particles, cork particles and the like. A roll obtained by adhering particles substantially uniformly with an adhesive, wherein the concave portion is a layer having a continuous pattern. An elastic particle such as rubber particles, synthetic resin particles, cork particles, etc. is adhered to the outer periphery of the core metal directly or through a rubber layer with an adhesive, and the surface of the concave portion has a continuous pattern. Manufacturing a roll, comprising a step of forming a layer and a step of applying an adhesive one or more times over the elastic particles, and then heating and curing the adhesive. Method.